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<!DOCTYPE html><html lang="en-US"><head><meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Oort Cloud - NASA Science</title> <link rel="apple-touch-icon" sizes="180x180" href="https://science.nasa.gov/apple-touch-icon.png"> <link rel="preload" href="https://science.nasa.gov/font-face.css" as="style"> <link rel="preload" href="https://smd-cms.nasa.gov/wp-content/client-mu-plugins/uswds-framework/uswds/fonts/public-sans/PublicSans-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous"> <link rel="preload" href="https://smd-cms.nasa.gov/wp-content/client-mu-plugins/uswds-framework/uswds/fonts-split/inter/UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa1ZL7.woff2" as="font" type="font/woff2" crossorigin="anonymous"> <link rel="preload" href="https://smd-cms.nasa.gov/wp-content/client-mu-plugins/uswds-framework/uswds/fonts-split/db-mono/aFTU7PB1QTsUX8KYthqQBA.woff2" as="font" type="font/woff2" crossorigin="anonymous"> <meta property="og:title" content="Oort Cloud - NASA Science"> <meta property="og:url" content="https://science.nasa.gov/solar-system/oort-cloud/"> <meta name="description" content="Overview The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It’s like a big, thick bubble around […]"> <meta property="og:description" content="Overview The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It’s like a big, thick bubble around […]"> <meta property="og:image" content="https://images-assets.nasa.gov/image/PIA23165/PIA23165~large.jpg?w=1920&h=1080&fit=clip&crop=faces%2Cfocalpoint"> <meta name="twitter:title" content="Oort Cloud - NASA Science"> <meta name="twitter:description" content="Overview The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It’s like a big, thick bubble around […]"> <meta name="twitter:image" content="https://images-assets.nasa.gov/image/PIA23165/PIA23165~large.jpg?w=1920&h=1080&fit=clip&crop=faces%2Cfocalpoint"> <meta name="twitter:card" content="summary_large_image"> <meta property="og:image:alt" content="This image shows comet C/2018 Y1 Iwamoto as imaged in multiple exposures of infrared light by NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) space telescope."> <meta name="twitter:image:alt" content="This image shows comet C/2018 Y1 Iwamoto as imaged in multiple exposures of infrared light by NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) space telescope."> <meta property="og:image:width" content="1920"> <meta name="twitter:image:width" content="1920"> <meta property="og:image:height" content="1080"> <meta name="twitter:image:height" content="1080"> <link rel="canonical" href="https://science.nasa.gov/solar-system/oort-cloud/"> <meta name="keywords" content="NASA Science"> 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engines"><ul><li>Missions <ul><li><a href="https://www.nasa.gov/missions/" tabindex="-1">Search All NASA Missions</a></li><li><a href="https://www.nasa.gov/a-to-z-of-nasa-missions/" tabindex="-1">A to Z List of Missions</a></li><li><a href="https://www.nasa.gov/events/" tabindex="-1">Upcoming Launches and Landings</a></li><li><a href="https://www.nasa.gov/humans-in-space/spaceships-and-rockets/" tabindex="-1">Spaceships and Rockets</a></li><li><a href="https://www.nasa.gov/communicating-with-missions/" tabindex="-1">Communicating with Missions</a></li><li><a href="https://www.nasa.gov/humans-in-space/artemis/" tabindex="-1">Artemis</a></li><li><a href="https://science.nasa.gov/mission/webb/" tabindex="-1">James Webb Space Telescope</a></li><li><a href="https://science.nasa.gov/mission/hubble/" tabindex="-1">Hubble Space Telescope</a></li><li><a href="https://www.nasa.gov/international-space-station/" tabindex="-1">International Space Station</a></li><li><a href="https://science.nasa.gov/mission/osiris-rex/" tabindex="-1">OSIRIS-REx</a></li></ul></li><li>Humans in Space <ul><li><a href="https://www.nasa.gov/humans-in-space/why-go-to-space/" tabindex="-1">Why Go to Space</a></li><li><a href="https://www.nasa.gov/humans-in-space/astronauts/" tabindex="-1">Astronauts</a></li><li><a href="https://www.nasa.gov/humans-in-space/commercial-space/" tabindex="-1">Commercial Space</a></li><li><a href="https://www.nasa.gov/humans-in-space/destinations/" tabindex="-1">Destinations</a></li><li><a href="https://www.nasa.gov/humans-in-space/spaceships-and-rockets/" tabindex="-1">Spaceships and Rockets</a></li><li><a href="https://www.nasa.gov/humans-in-space/living-in-space/" tabindex="-1">Living in Space</a></li></ul></li><li>Earth &amp; Climate <ul><li><a href="https://science.nasa.gov/earth/explore/" tabindex="-1">Explore Earth Science</a></li><li><a href="https://science.nasa.gov/climate-change/" tabindex="-1">Climate Change</a></li><li><a href="https://science.nasa.gov/earth/facts/" tabindex="-1">Earth, Our Planet</a></li><li><a href="https://science.nasa.gov/earth/in-action/" tabindex="-1">Earth Science in Action</a></li><li><a href="https://science.nasa.gov/earth/multimedia/" tabindex="-1">Earth Multimedia</a></li><li><a href="https://science.nasa.gov/earth/data/" tabindex="-1">Earth Data</a></li><li><a href="https://science.nasa.gov/earth-science/" tabindex="-1">Earth Science Researchers</a></li></ul></li><li>About NASA <ul><li><a href="https://www.nasa.gov/nasa-impacts/" tabindex="-1">NASA's Impacts</a></li><li><a href="https://www.nasa.gov/nasa-centers-and-facilities/" tabindex="-1">Centers and Facilities</a></li><li><a href="https://www.nasa.gov/nasa-directorates/" tabindex="-1">Directorates</a></li><li><a href="https://www.nasa.gov/nasa-organization/" tabindex="-1">Organizations</a></li><li><a href="https://www.nasa.gov/people-of-nasa/" tabindex="-1">People of NASA</a></li><li><a href="https://www.nasa.gov/careers/" tabindex="-1">Careers</a></li><li><a href="https://www.nasa.gov/learning-resources/nasa-internship-programs/" tabindex="-1">Internships</a></li><li><a href="https://www.nasa.gov/history/" tabindex="-1">Our History</a></li><li><a href="https://www.nasa.gov/doing-business-with-nasa/" tabindex="-1">Doing Business with NASA</a></li><li><a href="https://www.nasa.gov/get-involved/" tabindex="-1">Get Involved</a></li><li><a href="https://www.nasa.gov/contact-nasa/" tabindex="-1">Contact</a></li></ul></li><li>Learning Resources <ul><li><a href="https://www.nasa.gov/learning-resources/for-kids-and-students/" tabindex="-1">For Kids and Students</a></li><li><a href="https://www.nasa.gov/learning-resources/for-educators/" tabindex="-1">For Educators</a></li><li><a href="https://www.nasa.gov/learning-resources/colleges-and-universities/" tabindex="-1">For Colleges and Universities</a></li><li><a href="https://www.nasa.gov/learning-resources/for-professionals/" tabindex="-1">For Professionals</a></li><li><a href="https://science.nasa.gov/for-everyone/" tabindex="-1">Science for Everyone</a></li><li><a href="https://www.nasa.gov/learning-resources/requests-for-exhibits-artifacts-or-speakers/" tabindex="-1">Request an Exhibit or Speaker</a></li><li><a href="https://www.nasa.gov/learning-resources/stem-engagement-at-nasa/" tabindex="-1">STEM Engagement at NASA</a></li></ul></li><li>Aeronautics <ul><li><a href="https://www.nasa.gov/aeronautics/science-in-the-air/" tabindex="-1">Science in the Air</a></li><li><a href="https://www.nasa.gov/aeronautics/aircraft/" tabindex="-1">NASA Aircraft</a></li><li><a href="https://www.nasa.gov/aeronautics/flight-innovation/" tabindex="-1">Flight Innovation</a></li><li><a href="https://www.nasa.gov/aeronautics/supersonic-flight/" tabindex="-1">Supersonic Flight</a></li><li><a href="https://www.nasa.gov/aeronautics/air-traffic-solutions/" tabindex="-1">Air Traffic Solutions</a></li><li><a href="https://www.nasa.gov/aeronautics/green-aero-tech/" tabindex="-1">Green Aviation Tech</a></li><li><a href="https://www.nasa.gov/aeronautics/drones-and-you/" tabindex="-1">Drones & You</a></li></ul></li><li>Technology <ul><li><a href="https://www.nasa.gov/technology-transfer-spinoffs/" tabindex="-1">Technology Transfer & Spinoffs</a></li><li><a href="https://www.nasa.gov/space-travel-technology/" tabindex="-1">Space Travel Technology</a></li><li><a href="https://www.nasa.gov/space-living-technology/" tabindex="-1">Technology Living in Space</a></li><li><a href="https://www.nasa.gov/manufacturing-and-materials/" tabindex="-1">Manufacturing and Materials</a></li><li><a href="https://www.nasa.gov/robotics/" tabindex="-1">Robotics</a></li><li><a href="https://www.nasa.gov/science-instruments/" tabindex="-1">Science Instruments</a></li><li><a href="https://www.nasa.gov/computing/" tabindex="-1">Computing</a></li></ul></li><li>The Universe <ul><li><a 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margin-top-0">Oort Cloud</h1><p class="p-lg padding-0">Scientists think the Oort Cloud is a giant spherical shell surrounding our solar system. It is like a big, thick-walled bubble made of icy pieces of space debris the sizes of mountains and sometimes larger. The Oort Cloud might contain billions, or even trillions, of objects.</p></div><div class="grid-col-12 desktop:grid-col-6 padding-left-0 desktop:padding-left-4"><div class="page-intro-quick-facts border-top-1px border-color-carbon-30-important padding-top-2"><h2 class="label margin-top-0 margin-bottom-2 color-carbon-60-important">Quick Facts</h2><div class="hds-carousel-wrapper hds-carousel-wrapper-relative"><div class="swiper quick-facts-slider margin-bottom-1 desktop:margin-bottom-0"><div class="swiper-wrapper"><div class="swiper-slide quick-facts-slide" data-swiper-slide-index="0"><div class="grid-row flex-align-center"><div class="grid-col-9 padding-right-2 desktop:padding-right-5"><p class="p-md padding-0 margin-0">The Oort Cloud is home to most long-period comets, like comet Siding Spring. These comets take more than 200 years to orbit the Sun.</p></div><div class="grid-col-3 display-flex flex-justify-center"><div class="quick-facts-slider-image radius-pill margin-left-auto margin-right-3 desktop:margin-right-5"><figure class="hds-media-background"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=320&format=webp 320w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=640&format=webp 640w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=768&format=webp 768w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1024&format=webp 1024w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1280&format=webp 1280w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1536&format=webp 1536w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=2048&format=webp 2048w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=2560&format=webp 2560w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=3072&format=webp 3072w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=4096&format=webp 4096w"><img width="1024" height="819" alt="Bright comet is seen above red Mars against a backdrop of stars" loading="eager" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1.7);transform-origin:43% 27%;object-position:43% 27%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=4096&format=png" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=320&format=png 320w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=640&format=png 640w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=768&format=png 768w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1024&format=png 1024w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1280&format=png 1280w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1536&format=png 1536w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=2048&format=png 2048w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=2560&format=png 2560w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=3072&format=png 3072w, https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=4096&format=png 4096w"></picture></figure></div></div></div></div><div class="swiper-slide quick-facts-slide" data-swiper-slide-index="1"><div class="grid-row flex-align-center"><div class="grid-col-9 padding-right-2 desktop:padding-right-5"><p class="p-md padding-0 margin-0">Predictions indicate the Oort Cloud may contain more than a trillion icy objects.</p></div><div class="grid-col-3 display-flex flex-justify-center"><div class="quick-facts-slider-image radius-pill margin-left-auto margin-right-3 desktop:margin-right-5"><figure class="hds-media-background"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=320&format=webp&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=640&format=webp&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=768&format=webp&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1024&format=webp&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1280&format=webp&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1536&format=webp&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=2048&format=webp&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=2560&format=webp&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=3072&format=webp&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=4096&format=webp&fit=clip&crop=faces%2Cfocalpoint 4096w"><img width="380" height="380" alt="anim_comet" loading="eager" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1.02);transform-origin:77% 56.00000000000001%;object-position:77% 56.00000000000001%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=4096&format=png&fit=clip&crop=faces%2Cfocalpoint" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=320&format=png&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=640&format=png&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=768&format=png&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1024&format=png&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1280&format=png&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=1536&format=png&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=2048&format=png&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=2560&format=png&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=3072&format=png&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=4096&format=png&fit=clip&crop=faces%2Cfocalpoint 4096w"></picture></figure></div></div></div></div><div class="swiper-slide quick-facts-slide" data-swiper-slide-index="2"><div class="grid-row flex-align-center"><div class="grid-col-9 padding-right-2 desktop:padding-right-5"><p class="p-md padding-0 margin-0">The Oort Cloud is named for Jan Oort, the Dutch astronomer who predicted its existence in the 1950s.</p></div><div class="grid-col-3 display-flex flex-justify-center"><div class="quick-facts-slider-image radius-pill margin-left-auto margin-right-3 desktop:margin-right-5"><figure class="hds-media-background"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=320&format=webp&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=640&format=webp&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=768&format=webp&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1024&format=webp&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1280&format=webp&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1536&format=webp&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=2048&format=webp&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=2560&format=webp&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=3072&format=webp&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=4096&format=webp&fit=clip&crop=faces%2Cfocalpoint 4096w"><img width="1000" height="1000" alt loading="eager" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1.7);transform-origin:85% 60%;object-position:85% 60%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=4096&format=jpeg&fit=clip&crop=faces%2Cfocalpoint" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=320&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=640&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=768&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1024&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1280&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1536&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=2048&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=2560&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=3072&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=4096&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 4096w"></picture></figure></div></div></div></div></div><div class="hds-carousel-nav display-flex"><div class="hds-carousel-nav-arrow hds-carousel-arrow-prev"><svg version="1.1" x="0px" y="0px" width="9px" height="9px" viewBox="0 0 9 9"><path class="st0" d="M3.5,4.5l3.7-3.6L6.3,0L1.8,4.5L6.3,9l0.9-0.9L3.5,4.5z"></path></svg></div><div class="hds-carousel-nav-arrow hds-carousel-arrow-next"><svg version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" width="9px" height="9px" viewBox="0 0 9 9"><path class="st0" d="M5.5,4.5L1.8,8.1L2.7,9l4.5-4.5L2.7,0L1.8,0.9L5.5,4.5z"></path></svg></div></div></div></div></div></div></div></div></div></div></div><div class="GutenbergBlocksCustomFields hds-module"><div class="GutenbergBlocks hds-module"><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-top-5 margin-bottom-2"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div id="h-overview" class="BlockWrapper hds-module width-full maxw-full CoreHeadingBlock"><div class="grid-container-block grid-container padding-0"><h2><span>Overview</span></h2></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreListBlock"><div class="grid-container-block grid-container padding-y-0"><ol></ol></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreParagraphBlock"><div class="grid-container-block grid-container padding-0"><p class="margin-0 padding-0">The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It's like a big, thick bubble around our solar system, made of icy, comet-like objects. The Oort Cloud's icy bodies can be as large as mountains – and sometimes larger.</p></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreParagraphBlock"><div class="grid-container-block grid-container padding-0"><p class="margin-0 padding-0">Because the orbits of long-period comets – which take more than 200 years to orbit the Sun – are so extremely long, scientists suspect that the Oort Cloud is the source of most of those comets. For example, comet C/2013 A1 Siding Spring, which made a very close pass by Mars in 2014, will not return to the inner solar system for about 740,000 years.</p></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreParagraphBlock"><div class="grid-container-block grid-container padding-0"><p class="margin-0 padding-0">The distance from the Sun to the Oort Cloud is so enormous that it’s useful to describe it not in the more common units of miles or kilometers, but astronomical units. One astronomical unit (or AU) is the distance between Earth and the Sun. Pluto’s elliptical orbit carries it as close as 30 AU from the Sun, and as far as 50 AU. The inner edge of the Oort Cloud, however, is thought to be between 2,000 and 5,000 AU from the Sun. The outer edge might be 10,000 or even 100,000 AU from the Sun – that's one-quarter to halfway between the Sun and the nearest neighboring star.</p></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreParagraphBlock"><div class="grid-container-block grid-container padding-0"><p class="margin-0 padding-0">Though <a href="https://science.nasa.gov/solar-system/comets/facts/">long-period comets</a> observed among the planets are thought to originate in the Oort Cloud, no object has been observed in the distant Oort Cloud itself, leaving it a theoretical concept for the time being. But it remains the most widely-accepted explanation for the origin of long-period comets.</p></div></div></div></div><div class="BlockLayout margin-full-bleed"><div class="BlockWrapper hds-module nasa-gb-align-full maxw-full width-full padding-y-6 padding-x-3 bg-spacesuit-white color-mode-dark wp-block-nasa-blocks-news-automated"><div class="grid-container grid-container-block"><div class="grid-row flex-align-center margin-bottom-3"><div class="desktop:grid-col margin-bottom-2 desktop:margin-bottom-0"><h2 class="section-heading-md margin-0">Solar System News</h2></div><div class="desktop:grid-col display-flex flex-align-center desktop:flex-justify-end"><a href="/solar-system/oort-cloud/stories/" class="link-external-false BaseButton button-primary link-external-0 display-inline-block button-primary-md"><span class="display-flex flex-row flex-align-center width-auto"><span class="line-height-alt-1 width-auto" style="white-space:pre-wrap;min-width:1px;"><span>More Solar System Stories</span></span><svg viewBox="0 0 34 32" fill="none" xmlns="http://www.w3.org/2000/svg"><circle class="button-primary-circle" cx="16" cy="16" r="16"></circle><path d="M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z" class="color-spacesuit-white"></path></svg></span></a></div></div><div class="grid-row latest-news-items"><div class="grid-col mobile:grid-col tablet:grid-col-12 desktop:grid-col-7 latest-news-item-0 margin-bottom-2 -tablet:margin-bottom-0 desktop:margin-bottom-0 padding-right-0 tablet:padding-right-0 desktop:padding-right-2"><a href="/science-research/heliophysics/5-surprising-nasa-heliophysics-discoveries-not-related-to-the-sun/" class="link-external-false maxw-full width-full latest-news-item news-item news-item"><div class="hds-cover-wrapper cover-hover-zoom bg-carbon-black"><div class="skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-column flex-align-start flex-justify-start z-200"><div class="display-flex flex-align-center label color-spacesuit-white margin-bottom-auto"><svg version="1.1" class="square-2 margin-right-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16px" height="16px" viewBox="0 0 16 16" style="enable-background:new 0 0 16 16;" xml:space="preserve"><g><g><path d="M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z"></path><path d="M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z"></path></g></g></svg><span>Article</span></div><div class="display-block maxw-tablet"><div class="label margin-bottom-1">5 min read</div><p class="heading-22 color-spacesuit-white margin-0"><span>5 Surprising NASA Heliophysics Discoveries Not Related to the Sun</span></p></div></div><figure class="hds-media-background z-100"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=320&format=webp&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=640&format=webp&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=768&format=webp&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1024&format=webp&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1280&format=webp&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1536&format=webp&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=2048&format=webp&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=2560&format=webp&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=3072&format=webp&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=4096&format=webp&fit=clip&crop=faces%2Cfocalpoint 4096w"><img width="1024" height="576" alt="In this illustration, an exploding star powers jets of material. The star is shown as an almost flower-like shape. The purple �petals� represent clouds of material created in the explosion. The bluish-white and yellow center shows where the newly formed black hole begins driving the jets. The core of the jet pointed toward us is whitish and the broader regions are magenta. In the distance, on the far side of the star, you can see the opposite side of the jet disappearing into space." loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=4096&format=jpeg&fit=clip&crop=faces%2Cfocalpoint" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=320&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=640&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=768&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1024&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1280&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1536&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=2048&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=2560&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=3072&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=4096&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 4096w"></picture></figure></div></a></div><div class="tablet:grid-col desktop:grid-col-5 grid-row latest-news-items"><a href="https://www.nasa.gov/solar-system/planets/jupiter/jupiter-moons/europa/nasa-ocean-world-explorers-have-to-swim-before-they-can-fly/" rel="noopener noreferrer" target="_self" class="link-external-false maxw-full width-full latest-news-item news-item tablet:grid-col latest-news-item latest-news-item-1 news-item margin-bottom-2 tablet:margin-bottom-0 desktop:margin-bottom-0 padding-right-0"><div class="hds-cover-wrapper cover-hover-zoom bg-carbon-black"><div class="skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-column flex-align-start flex-justify-start z-200"><div class="display-flex flex-align-center label color-spacesuit-white margin-bottom-auto"><svg version="1.1" class="square-2 margin-right-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16px" height="16px" viewBox="0 0 16 16" style="enable-background:new 0 0 16 16;" xml:space="preserve"><g><g><path d="M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z"></path><path d="M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z"></path></g></g></svg><span>Article</span></div><div class="display-block maxw-tablet"><div class="label margin-bottom-1">5 min read</div><p class="heading-22 color-spacesuit-white margin-0"><span>NASA Ocean World Explorers Have to Swim Before They Can Fly</span></p></div></div><figure class="hds-media-background z-100"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=320&format=webp 320w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=640&format=webp 640w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=768&format=webp 768w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1024&format=webp 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1280&format=webp 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1536&format=webp 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=2048&format=webp 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=2560&format=webp 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=3072&format=webp 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=4096&format=webp 4096w"><img alt loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=4096&format=png" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=320&format=png 320w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=640&format=png 640w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=768&format=png 768w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1024&format=png 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1280&format=png 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=1536&format=png 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=2048&format=png 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=2560&format=png 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=3072&format=png 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png?w=4096&format=png 4096w"></picture></figure></div></a></div></div><div class="grid-row padding-top-2 desktop:padding-top-5"><a href="https://www.nasa.gov/solar-system/planets/mars/making-mars-moons-supercomputers-offer-disruptive-new-explanation-2/" rel="noopener noreferrer" target="_self" class="link-external-false maxw-full width-full mobile:grid-col-12 tablet:grid-col-12 desktop:grid-col padding-bottom-4 desktop:padding-bottom-0 padding-right-0 desktop:padding-right-2"><div class="display-flex"><div class="padding-right-3"><div class="hds-cover-wrapper cover-hover-zoom bg-carbon-black circle-10 minw-10 maxh-10 minh-10"><figure class="hds-media-background z-100"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=320&format=webp 320w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=640&format=webp 640w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=768&format=webp 768w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1024&format=webp 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1280&format=webp 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1536&format=webp 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=2048&format=webp 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=2560&format=webp 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=3072&format=webp 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=4096&format=webp 4096w"><img alt loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=4096&format=png" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=320&format=png 320w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=640&format=png 640w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=768&format=png 768w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1024&format=png 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1280&format=png 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=1536&format=png 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=2048&format=png 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=2560&format=png 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=3072&format=png 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png?w=4096&format=png 4096w"></picture></figure></div></div><div><div class="label margin-bottom-1 color-carbon-black">5 min read</div><p class="heading-14 color-carbon-black line-height-md margin-top-1 margin-bottom-1">Making Mars’ Moons: Supercomputers Offer ‘Disruptive’ New Explanation</p><div class="display-flex flex-align-center label color-carbon-60 margin-bottom-auto"><svg version="1.1" class="square-2 margin-right-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16px" height="16px" viewBox="0 0 16 16" style="enable-background:new 0 0 16 16;" xml:space="preserve"><g><g><path d="M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z"></path><path d="M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z"></path></g></g></svg><span>Article</span><span class="margin-left-2">7 days ago</span></div></div></div></a><a href="https://www.nasa.gov/missions/artemis/gateway/gateway-tops-off/" rel="noopener noreferrer" target="_self" class="link-external-false maxw-full width-full mobile:grid-col-12 tablet:grid-col-12 desktop:grid-col padding-bottom-4 desktop:padding-bottom-0 padding-right-0 desktop:padding-right-2"><div class="display-flex"><div class="padding-right-3"><div class="hds-cover-wrapper cover-hover-zoom bg-carbon-black circle-10 minw-10 maxh-10 minh-10"><figure class="hds-media-background z-100"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=320&format=webp 320w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=640&format=webp 640w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=768&format=webp 768w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1024&format=webp 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1280&format=webp 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1536&format=webp 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=2048&format=webp 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=2560&format=webp 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=3072&format=webp 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=4096&format=webp 4096w"><img alt loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=4096&format=jpeg" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=320&format=jpeg 320w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=640&format=jpeg 640w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=768&format=jpeg 768w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1024&format=jpeg 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1280&format=jpeg 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=1536&format=jpeg 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=2048&format=jpeg 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=2560&format=jpeg 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=3072&format=jpeg 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg?w=4096&format=jpeg 4096w"></picture></figure></div></div><div><div class="label margin-bottom-1 color-carbon-black">2 min read</div><p class="heading-14 color-carbon-black line-height-md margin-top-1 margin-bottom-1">Gateway Tops Off</p><div class="display-flex flex-align-center label color-carbon-60 margin-bottom-auto"><svg version="1.1" class="square-2 margin-right-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16px" height="16px" viewBox="0 0 16 16" style="enable-background:new 0 0 16 16;" xml:space="preserve"><g><g><path d="M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z"></path><path d="M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z"></path></g></g></svg><span>Article</span><span class="margin-left-2">7 days ago</span></div></div></div></a><a href="https://www.nasa.gov/image-article/on-this-day-apollo-12-lands-on-the-moon/" rel="noopener noreferrer" target="_self" class="link-external-false maxw-full width-full mobile:grid-col-12 tablet:grid-col-12 desktop:grid-col padding-bottom-4 desktop:padding-bottom-0 padding-right-0 desktop:padding-right-2"><div class="display-flex"><div class="padding-right-3"><div class="hds-cover-wrapper cover-hover-zoom bg-carbon-black circle-10 minw-10 maxh-10 minh-10"><figure class="hds-media-background z-100"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=320&format=webp 320w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=640&format=webp 640w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=768&format=webp 768w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1024&format=webp 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1280&format=webp 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1536&format=webp 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=2048&format=webp 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=2560&format=webp 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=3072&format=webp 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=4096&format=webp 4096w"><img alt loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=4096&format=jpeg" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=320&format=jpeg 320w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=640&format=jpeg 640w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=768&format=jpeg 768w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1024&format=jpeg 1024w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1280&format=jpeg 1280w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=1536&format=jpeg 1536w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=2048&format=jpeg 2048w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=2560&format=jpeg 2560w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=3072&format=jpeg 3072w, https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg?w=4096&format=jpeg 4096w"></picture></figure></div></div><div><div class="label margin-bottom-1 color-carbon-black">1 min read</div><p class="heading-14 color-carbon-black line-height-md margin-top-1 margin-bottom-1">On This Day: Apollo 12 Lands on the Moon</p><div class="display-flex flex-align-center label color-carbon-60 margin-bottom-auto"><svg version="1.1" class="square-2 margin-right-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="16px" height="16px" viewBox="0 0 16 16" style="enable-background:new 0 0 16 16;" xml:space="preserve"><g><g><path d="M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z"></path><path d="M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z"></path></g></g></svg><span>Image Article</span></div></div></div></a></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreListBlock"><div class="grid-container-block grid-container padding-y-0"><ol></ol></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-top-5 margin-bottom-2"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div id="h-fast-fact" class="BlockWrapper hds-module width-full maxw-full CoreHeadingBlock"><div class="grid-container-block grid-container padding-0"><h2><span><strong>Fast Fact</strong></span></h2></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-3"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module width-full maxw-full CoreParagraphBlock"><div class="grid-container-block grid-container padding-0"><p class="margin-0 padding-0">Even though Voyager 1 travels about a million miles per day, the spacecraft will take about 300 years to reach the inner boundary of the Oort Cloud and probably another 30,000 years to exit the far side.</p></div></div></div></div><div class="BlockLayout BlockLayoutGeneric grid-row grid-container grid-container-block smd-padding-x-responsive margin-y-5 desktop:margin-y-6"><div class="grid-col-12 desktop:grid-col-8 desktop:grid-offset-2"><div class="BlockWrapper hds-module CoreEmbedBlock hds-media margin-left-auto margin-right-auto"><figure class="wp-block-embed is-type-video is-providerNameSlug-youtube wp-block-embed-youtube"><div class="flex-container"><div class="wp-block-embed__wrapper"><iframe title="Our Milky Way Galaxy: How Big is Space?" width="500" height="281" src="https://www.youtube.com/embed/MX3PIkbTQwQ?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></div><div class="caption-wrapper"><figcaption class="hds-caption padding-top-2"><div class="hds-caption-text p-sm margin-0">A short video guide to distance in the cosmos. NASA/JPL-Caltech</div></figcaption></div></div></figure></div></div></div><div class="BlockLayout margin-y-3"><div class="BlockWrapper hds-module bg-spacesuit-white padding-x-2 tablet:padding-x-3 desktop:padding-x-4 wp-block-nasa-blocks-featured-link-list NasaBlocksFeaturedLinkListBlock"><div class="grid-container grid-container-block padding-0"><div class="margin-bottom-4"><h2 class="heading-22 margin-0">Learn More</h2></div><ul class="margin-0 padding-0"><li class="grid-row padding-y-2 border-top-1px border-color-carbon-30-important"><div class="grid-row featured-link-list-row width-full"><div class="grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5"><div class="width-full"><div class="hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden"><figure class="hds-media-background"><picture class="BaseMedia width-full"><source type="image/webp" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=320&format=webp&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=640&format=webp&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=768&format=webp&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=1024&format=webp&fit=clip&crop=faces%2Cfocalpoint 1024w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=1280&format=webp&fit=clip&crop=faces%2Cfocalpoint 1280w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=1536&format=webp&fit=clip&crop=faces%2Cfocalpoint 1536w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=2048&format=webp&fit=clip&crop=faces%2Cfocalpoint 2048w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=2560&format=webp&fit=clip&crop=faces%2Cfocalpoint 2560w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=3072&format=webp&fit=clip&crop=faces%2Cfocalpoint 3072w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=4096&format=webp&fit=clip&crop=faces%2Cfocalpoint 4096w"><img width="2400" height="2061" alt loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1.8);transform-origin:75% 66%;object-position:75% 66%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=4096&format=jpeg&fit=clip&crop=faces%2Cfocalpoint" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=320&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 320w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=640&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 640w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=768&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 768w, https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/Oort_Cloud.jpg?w=1024&format=jpeg&fit=clip&crop=faces%2Cfocalpoint 1024w, 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desktop:grid-col-10 padding-left-3 desktop:padding-left-0"><div class="grid-row flex-align-center"><div class="grid-col-12 desktop:grid-col-6"><h3 class="heading-36 margin-0"><span>For Kids: About the Oort Cloud</span></h3></div><div class="grid-col-12 desktop:grid-col-6"><p class="p-md margin-0 color-carbon-black">Explore more about the Oort Cloud</p></div></div></div><div class="grid-col-2 desktop:grid-col-1 display-flex flex-justify-end"><a href="https://spaceplace.nasa.gov/menu/oort-cloud/" rel="noopener noreferrer" target="_self" class="link-external-false" aria-label="For Kids: About the Oort Cloud"><svg class="hds-featured-link-list-button margin-left-auto margin-right-0" viewBox="0 0 32 32" fill="none"><circle class="color-nasa-red" cx="16" cy="16" r="16"></circle><path d="M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z" class="color-spacesuit-white"></path></svg></a></div></div></li></ul></div></div></div></div></div><div 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srcset="https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=320&format=webp 320w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=640&format=webp 640w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=768&format=webp 768w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1024&format=webp 1024w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1280&format=webp 1280w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1536&format=webp 1536w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=2048&format=webp 2048w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=2560&format=webp 2560w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=3072&format=webp 3072w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=4096&format=webp 4096w"><img width="1024" height="686" alt="A man looks through a telescope at twilight." loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=4096&format=png" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=320&format=png 320w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=640&format=png 640w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=768&format=png 768w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1024&format=png 1024w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1280&format=png 1280w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=1536&format=png 1536w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=2048&format=png 2048w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=2560&format=png 2560w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=3072&format=png 3072w, https://science.nasa.gov/wp-content/uploads/2023/06/7457588672-61c58e8f44-k-jpg.webp?w=4096&format=png 4096w"></picture></figure></div></a></div><div class="swiper-slide topic-card-slide mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0"><a href="/dwarf-planets/pluto/" 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srcset="https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=320&format=webp 320w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=640&format=webp 640w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=768&format=webp 768w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1024&format=webp 1024w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1280&format=webp 1280w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1536&format=webp 1536w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=2048&format=webp 2048w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=2560&format=webp 2560w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=3072&format=webp 3072w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=4096&format=webp 4096w"><img width="344" height="196" alt="This full disc view of Pluto features bright region that looks like a heart on the side of the dwarf planet." loading="lazy" decoding="async" onerror="this.setAttribute('data-error', 1)" style="transform:scale(1);transform-origin:50% 50%;object-position:50% 50%;object-fit:cover;" class="width-full" data-nuxt-pic src="https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=4096&format=png" sizes="(max-width: 640px) 320px, (max-width: 768px) 640px, (max-width: 1024px) 768px, (max-width: 1280px) 1024px, (max-width: 1536px) 1280px, 2048px" srcset="https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=320&format=png 320w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=640&format=png 640w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=768&format=png 768w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1024&format=png 1024w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1280&format=png 1280w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=1536&format=png 1536w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=2048&format=png 2048w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=2560&format=png 2560w, https://science.nasa.gov/wp-content/uploads/2016/05/screenshot-2023-11-02-at-4.28.52-pm.png?w=3072&format=png 3072w, 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Updated:</div><div title="Page Last Updated: Thu Oct 31 2024 21:08:46 GMT+0000 (Coordinated Universal Time)" class="hds-footer-meta-value" data-v-21bfe27b>4 weeks ago</div></li><li class="hds-footer-meta" data-v-21bfe27b><div class="hds-footer-meta-label" data-v-21bfe27b>Page Editor:</div><div class="hds-footer-meta-value" data-v-21bfe27b>SMD Content Editors</div></li><li class="hds-footer-meta" data-v-21bfe27b><div class="hds-footer-meta-label" data-v-21bfe27b>Responsible NASA Official for Science:</div><div class="hds-footer-meta-value" data-v-21bfe27b>Dana Bolles</div></li></ul></div></div></div></div></footer></div></div></div><div id="teleports"></div><script type="application/json" id="__NUXT_DATA__" data-ssr="true">[["Reactive",1],{"data":2,"state":871,"once":884,"_errors":885,"serverRendered":84,"path":886,"pinia":887},{"36VOn7FKjO":3,"AWUXVp57yf":433},{"type":4,"value":5},"post",{"id":6,"post_type":7,"title":8,"authors":9,"categories":29,"classes":30,"color_mode":36,"date":37,"date_gmt":38,"modified_date_gmt":39,"manualExcerpt":26,"preview":27,"permalink":40,"purge":41,"readTime":44,"seo":45,"template":58,"timeAgo":59,"blocks":60},56999,"topic","Oort Cloud",[10],{"id":11,"first-name":12,"last-name":13,"display-name":14,"email":15,"biography":16,"images":17,"location":23,"phone":24,"job-title":16,"country":25,"read-more":26,"on-contract":27,"social-links":28},73,"Anthony","Greicius","agreicius","anthony.greicius-116962@jpl.nasa.gov","",{"thumbnail-md":18,"thumbnail-lg":19,"medium":20,"card-sm":21,"card-md":22},"https://secure.gravatar.com/avatar/d67954767a49c0d1dbe8cce1746b2314?s=100&d=mm&r=g","https://secure.gravatar.com/avatar/d67954767a49c0d1dbe8cce1746b2314?s=200&d=mm&r=g","https://secure.gravatar.com/avatar/d67954767a49c0d1dbe8cce1746b2314?s=300&d=mm&r=g","https://secure.gravatar.com/avatar/d67954767a49c0d1dbe8cce1746b2314?s=600&d=mm&r=g","https://secure.gravatar.com/avatar/d67954767a49c0d1dbe8cce1746b2314?s=900&d=mm&r=g",[],[],"US",null,false,[],[],[31,7,32,33,34,35],"post-56999","type-topic","status-publish","has-post-thumbnail","hentry","light","2023-06-20 20:22:15","2023-06-21 04:22:15","2024-10-31 21:08:46","https://science.nasa.gov/solar-system/oort-cloud/",[42,43],"https://smd-cms.nasa.gov/wp-json/smd/v1/router/solar-system/oort-cloud","https://smd-cms.nasa.gov/wp-json/smd/v1/router/solar-system/oort-cloud/",2,{"canonical":40,"meta":46,"opengraph":47,"title":57},{"description":16},{"description":48,"image":49,"title":8,"type":56},"Overview The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It’s like a big, thick bubble around […]",{"alt":50,"size":51,"type":54,"url":55},"This image shows comet C/2018 Y1 Iwamoto as imaged in multiple exposures of infrared light by NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) space telescope.",{"width":52,"height":53},1920,1080,"image","https://images-assets.nasa.gov/image/PIA23165/PIA23165~large.jpg?w=1920&h=1080&fit=clip&crop=faces%2Cfocalpoint","article","Oort Cloud - NASA Science","default","1 year",[61,127,222,227,234,238,241,244,247,339,344,349,352,360,379],{"name":62,"attributes":63},"nasa-blocks/secondary-navigation",{"align":64,"anchor":16,"colorMode":58,"enable_breadcrumbs":65,"post_id":66,"breadcrumbs":67,"hdsnav_color_mode":77,"navLinks":78,"postDetails":124},"full","true","98247",[68,72,76],{"breadcrumb_title":69,"post_title":70,"url":71},"…","Home","https://science.nasa.gov/",{"id":73,"breadcrumb_title":74,"post_title":74,"url":75},50882,"Solar System Exploration","https://science.nasa.gov/solar-system/",{"breadcrumb_title":8,"post_title":8,"url":16},"dark",[79,92,105,116],{"link_title":80,"linkType":81,"linkId":82,"subMenus":86},"Oort Cloud Overview","link",{"id":6,"title":8,"kind":83,"type":7,"url":40,"external":84,"target":85},"post-type",true,"_self",[87],{"link_title":88,"linkType":81,"linkId":89},"Submenu One Title",{"id":90,"title":26,"kind":26,"type":26,"url":91,"external":84,"target":85},0,"https://science.nasa.gov/submenu-one-url",{"link_title":93,"linkType":81,"anchorId":16,"linkId":94,"subMenus":98},"Facts",{"id":95,"title":96,"kind":83,"type":7,"url":97,"external":84,"target":85},108069,"Oort Cloud: Facts","https://science.nasa.gov/solar-system/oort-cloud/facts/",[99,101],{"link_title":88,"linkType":81,"linkId":100},{"id":90,"title":26,"kind":26,"type":26,"url":91,"external":84,"target":85},{"link_title":102,"linkType":81,"linkId":103},"Submenu Two Title",{"id":90,"title":26,"kind":26,"type":26,"url":104,"external":84,"target":85},"https://science.nasa.gov/submenu-two-url",{"link_title":106,"linkType":81,"anchorId":16,"linkId":107,"subMenus":111},"Multimedia",{"id":108,"title":109,"kind":83,"type":7,"url":110,"external":84,"target":85},108068,"Oort Cloud Multimedia","https://science.nasa.gov/solar-system/oort-cloud/multimedia/",[112,114],{"link_title":88,"linkType":81,"linkId":113},{"id":90,"title":26,"kind":26,"type":26,"url":91,"external":84,"target":85},{"link_title":102,"linkType":81,"linkId":115},{"id":90,"title":26,"kind":26,"type":26,"url":104,"external":84,"target":85},{"link_title":117,"linkType":81,"anchorId":16,"linkId":118,"subMenus":119},"Solar System Home",{"id":90,"title":26,"kind":26,"type":26,"url":75,"external":84,"target":85},[120,122],{"link_title":88,"linkType":81,"linkId":121},{"id":90,"title":26,"kind":26,"type":26,"url":91,"external":84,"target":85},{"link_title":102,"linkType":81,"linkId":123},{"id":90,"title":26,"kind":26,"type":26,"url":104,"external":84,"target":85},{"title":125,"url":126},"SSE-The Oort Cloud","https://science.nasa.gov/?hdsnav=sse-the-oort-cloud",{"name":128,"attributes":129},"nasa-blocks/page-intro",{"align":64,"anchor":16,"anchorLinks":130,"banner_bg":151,"banner_description":159,"description":160,"heading":8,"image_1":161,"image_2":167,"image_3":171,"linkId":175,"more_link":16,"show_images":157,"show_stats":157,"slider_heading":177,"slides":178,"stat_1_label":212,"stat_1_value":213,"stat_2_label":214,"stat_2_value":215,"stat_3_label":216,"stat_3_value":217,"stat_4_label":218,"stat_4_value":219,"tagline":220,"variation":221},[131,133,135,137,139,141,143,145,147,149],{"link_text":132,"linkId":26},"Agriculture",{"link_text":134,"linkId":26},"Human Health",{"link_text":136,"linkId":26},"Ecosystems & Biodiversity",{"link_text":138,"linkId":26},"Fire",{"link_text":140,"linkId":26},"Disasters",{"link_text":142,"linkId":26},"Energy",{"link_text":144,"linkId":26},"Forest Management",{"link_text":146,"linkId":26},"Urban Growth",{"link_text":148,"linkId":26},"Carbon & Climate",{"link_text":150,"linkId":26},"Water",{"id":152,"url":55,"alt":50,"caption":153,"credits":16,"fit":154,"zoom":90,"focalPoint":155,"parallax":157,"detail_link":158,"contentType":54,"width":52,"height":53},57007,"Comet C/2018 Y1 Iwamoto as imaged in multiple exposures of infrared light by the NEOWISE space telescope. The infrared images were taken on Feb. 25, 2019, when the comet was about 56 million miles, or 90 million kilometers, from Earth. C/2018 Y1 Iwamoto is a long-period comet originally from the Oort Cloud and coming in near the Sun for the first time in over 1,000 years. Appearing as a string of red dots, this comet can be seen in a series of exposures captured by the spacecraft. Infrared light detected by the 3.4-micron channel is mapped to blue and green, while light from the 4.6-micron channel is mapped to red. In this image, stars show up as blue because they are hotter, whereas the cooler dust around the comet - with a temperature near the freezing point of water - glows red. Movie available at https://photojournal.jpl.nasa.gov/catalog/PIA23165","cover",{"x":90,"y":156},0.58,"no","https://science.nasa.gov/image-detail/amf-pia23165/","The Oort Cloud is the most distant region of our solar system. Even the nearest objects in the Oort Cloud are thought to be many times farther from the Sun than the outer reaches of the Kuiper Belt.","Scientists think the Oort Cloud is a giant spherical shell surrounding our solar system. It is like a big, thick-walled bubble made of icy pieces of space debris the sizes of mountains and sometimes larger. The Oort Cloud might contain billions, or even trillions, of objects.",{"id":90,"url":162,"alt":163,"caption":16,"credits":16,"fit":154,"zoom":164,"focalPoint":165,"parallax":157,"detail_link":26},"https://live.staticflickr.com/65535/49797993848_5314da8448_h.jpg","Special delivery to ISS",20,{"x":166,"y":166},".50",{"id":90,"url":168,"alt":169,"caption":16,"credits":16,"fit":154,"zoom":164,"focalPoint":170,"parallax":157,"detail_link":26},"https://live.staticflickr.com/4115/4858568740_6632dc4f4c_h.jpg","An early shuttle launch",{"x":166,"y":166},{"id":90,"url":172,"alt":173,"caption":16,"credits":16,"fit":154,"zoom":164,"focalPoint":174,"parallax":157,"detail_link":26},"https://live.staticflickr.com/1611/25524892462_a030e841bb_h.jpg","Blurry satellite against the blackness of space",{"x":166,"y":166},{"id":90,"title":26,"kind":26,"type":26,"url":176,"external":84,"target":85},"https://science.nasa.gov/location/goddard-space-flight-center/","Quick Facts",[179,193,203],{"slide_image":180,"slide_text":192},{"id":181,"url":182,"alt":183,"caption":184,"credits":185,"fit":154,"zoom":186,"focalPoint":187,"parallax":157,"detail_link":26,"contentType":54,"width":190,"height":191},98811,"https://science.nasa.gov/wp-content/uploads/2016/05/mars-siding-spring-jpg.webp?w=1024","Bright comet is seen above red Mars against a backdrop of stars","Comet Siding Spring makes a close pass by Mars in 2014.","NASA, ESA, J.-Y. Li (PSI), C.M. Lisse (JHU/APL), and the Hubble Heritage Team (STScI/AURA)",70,{"x":188,"y":189},0.43,0.27,1024,819,"The Oort Cloud is home to most long-period comets, like comet Siding Spring. These comets take more than 200 years to orbit the Sun.",{"slide_image":194,"slide_text":202},{"id":195,"url":196,"alt":197,"caption":16,"credits":16,"fit":154,"zoom":44,"focalPoint":198,"parallax":157,"detail_link":26,"contentType":54,"width":201,"height":201},276791,"https://assets.science.nasa.gov/content/dam/science/esd/climate/internal_resources/923/anim_comet.gif?w=380&h=380&fit=clip&crop=faces%2Cfocalpoint","anim_comet",{"x":199,"y":200},0.77,0.56,380,"Predictions indicate the Oort Cloud may contain more than a trillion icy objects.",{"slide_image":204,"slide_text":211},{"id":205,"url":206,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":186,"focalPoint":207,"parallax":157,"detail_link":26,"contentType":54,"width":210,"height":210},152348,"https://assets.science.nasa.gov/dynamicimage/assets/science/psd/solar/2023/09/o/OortCloud1000w.jpg?w=1000&h=1000&fit=clip&crop=faces%2Cfocalpoint",{"x":208,"y":209},0.85,0.6,1000,"The Oort Cloud is named for Jan Oort, the Dutch astronomer who predicted its existence in the 1950s.","Location","Greenbelt, MD","Founded","May 1, 1959","People","10,000+","Director","Dennis J. Andrucyk","Impact & Benefits","quick_facts",{"name":223,"attributes":224},"core/heading",{"anchor":225,"content":226,"level":44,"stripped_content":226},"h-overview","Overview",{"name":228,"attributes":229,"innerBlocks":230},"core/list",{"anchor":16,"ordered":84,"values":16},[231],{"name":232,"attributes":233},"core/list-item",{"anchor":16,"content":16},{"name":235,"attributes":236},"core/paragraph",{"anchor":16,"content":237,"dropCap":27},"The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects. It's like a big, thick bubble around our solar system, made of icy, comet-like objects. The Oort Cloud's icy bodies can be as large as mountains – and sometimes larger.",{"name":235,"attributes":239},{"anchor":16,"content":240,"dropCap":27},"Because the orbits of long-period comets – which take more than 200 years to orbit the Sun – are so extremely long, scientists suspect that the Oort Cloud is the source of most of those comets. For example, comet C/2013 A1 Siding Spring, which made a very close pass by Mars in 2014, will not return to the inner solar system for about 740,000 years.",{"name":235,"attributes":242},{"anchor":16,"content":243,"dropCap":27},"The distance from the Sun to the Oort Cloud is so enormous that it’s useful to describe it not in the more common units of miles or kilometers, but astronomical units. One astronomical unit (or AU) is the distance between Earth and the Sun. Pluto’s elliptical orbit carries it as close as 30 AU from the Sun, and as far as 50 AU. The inner edge of the Oort Cloud, however, is thought to be between 2,000 and 5,000 AU from the Sun. The outer edge might be 10,000 or even 100,000 AU from the Sun – that's one-quarter to halfway between the Sun and the nearest neighboring star.",{"name":235,"attributes":245},{"anchor":16,"content":246,"dropCap":27},"Though \u003Ca href=\"https://science.nasa.gov/solar-system/comets/facts/\">long-period comets\u003C/a> observed among the planets are thought to originate in the Oort Cloud, no object has been observed in the distant Oort Cloud itself, leaving it a theoretical concept for the time being. But it remains the most widely-accepted explanation for the origin of long-period comets.",{"name":248,"attributes":249},"nasa-blocks/news-automated",{"align":64,"anchor":16,"category":250,"heading":251,"linkId":252,"more_link":256,"news_tags":257,"number_news_items":258,"show_link":84,"source":16,"latest_news":259},"1916","Solar System News",{"id":253,"title":254,"kind":83,"type":7,"url":255,"external":84,"target":85},100793,"Oort Cloud Stories","https://science.nasa.gov/solar-system/oort-cloud/stories/","More Solar System Stories","all","5",[260,275,283,290,297,307,314,326],{"id":261,"post_type":4,"title":262,"featuredImg":263,"time_ago":272,"read_time":273,"link":274},434976,"5 Surprising NASA Heliophysics Discoveries Not Related to the Sun",{"id":264,"url":265,"alt":266,"caption":267,"credits":268,"fit":154,"zoom":90,"focalPoint":269,"parallax":157,"detail_link":26,"contentType":54,"width":190,"height":271},195000,"https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/691/GRB_Jet.jpeg?w=1024&h=576&fit=clip&crop=faces%2Cfocalpoint","In this illustration, an exploding star powers jets of material. The star is shown as an almost flower-like shape. The purple �petals� represent clouds of material created in the explosion. The bluish-white and yellow center shows where the newly formed black hole begins driving the jets. The core of the jet pointed toward us is whitish and the broader regions are magenta. In the distance, on the far side of the star, you can see the opposite side of the jet disappearing into space.","As a star explodes, narrow beams (white) of gamma rays are emitted first, followed by wider beams (magenta).","NASA/Swift/Cruz deWilde",{"x":270,"y":270},0.5,576,"7 days ago",5,"https://science.nasa.gov/science-research/heliophysics/5-surprising-nasa-heliophysics-discoveries-not-related-to-the-sun/",{"id":276,"post_type":277,"title":278,"featuredImg":279,"time_ago":272,"read_time":273,"link":282},435486,"post-ext","NASA Ocean World Explorers Have to Swim Before They Can Fly",{"id":26,"url":280,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":281,"parallax":157,"detail_link":26},"https://www.nasa.gov/wp-content/uploads/2024/11/1-pia26423-swim-phase-ii-reflection.png",{"x":270,"y":270},"https://www.nasa.gov/solar-system/planets/jupiter/jupiter-moons/europa/nasa-ocean-world-explorers-have-to-swim-before-they-can-fly/",{"id":284,"post_type":277,"title":285,"featuredImg":286,"time_ago":272,"read_time":273,"link":289},435457,"Making Mars’ Moons: Supercomputers Offer ‘Disruptive’ New Explanation",{"id":26,"url":287,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":288,"parallax":157,"detail_link":26},"https://www.nasa.gov/wp-content/uploads/2024/11/mars-moons-simulations.png",{"x":270,"y":270},"https://www.nasa.gov/solar-system/planets/mars/making-mars-moons-supercomputers-offer-disruptive-new-explanation-2/",{"id":291,"post_type":277,"title":292,"featuredImg":293,"time_ago":272,"read_time":44,"link":296},435448,"Gateway Tops Off",{"id":26,"url":294,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":295,"parallax":157,"detail_link":26},"https://www.nasa.gov/wp-content/uploads/2024/11/jsc2024e044854-1.jpg",{"x":270,"y":270},"https://www.nasa.gov/missions/artemis/gateway/gateway-tops-off/",{"id":298,"post_type":299,"title":300,"featuredImg":301,"time_ago":304,"read_time":305,"link":306},435408,"image-article-ext","On This Day: Apollo 12 Lands on the Moon",{"id":26,"url":302,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":303,"parallax":157,"detail_link":26},"https://www.nasa.gov/wp-content/uploads/2024/11/as12-46-6728orig.jpg",{"x":270,"y":270},"1 week ago",1,"https://www.nasa.gov/image-article/on-this-day-apollo-12-lands-on-the-moon/",{"id":308,"post_type":277,"title":309,"featuredImg":310,"time_ago":304,"read_time":273,"link":313},435025,"NASA’s Curiosity Mars Rover Takes a Last Look at Mysterious Sulfur",{"id":26,"url":311,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":312,"parallax":157,"detail_link":26},"https://www.nasa.gov/wp-content/uploads/2024/11/e1-pia26471-curiosity-3000pixels.jpg",{"x":270,"y":270},"https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/nasas-curiosity-mars-rover-takes-a-last-look-at-mysterious-sulfur/",{"id":315,"post_type":4,"title":316,"featuredImg":317,"time_ago":323,"read_time":324,"link":325},427407,"Astrophotography With Your Smartphone",{"id":318,"url":319,"alt":16,"caption":16,"credits":16,"fit":154,"zoom":90,"focalPoint":320,"parallax":157,"detail_link":26,"contentType":54,"width":321,"height":322},427415,"https://science.nasa.gov/wp-content/uploads/2024/10/smartphone-on-tripod.jpg?w=570",{"x":270,"y":270},570,504,"2 weeks ago",3,"https://science.nasa.gov/solar-system/skywatching/night-sky-network/astrophotography-with-your-smartphone/",{"id":327,"post_type":328,"title":16,"featuredImg":329,"time_ago":323,"read_time":305,"link":338},433622,"feature",{"id":330,"url":331,"alt":332,"caption":333,"credits":334,"fit":154,"zoom":90,"focalPoint":335,"parallax":157,"detail_link":26,"contentType":54,"width":336,"height":337},433693,"https://assets.science.nasa.gov/dynamicimage/assets/science/hpd/itm/Neil%20Zeller_Tripod%20Aurora.jpg?w=2048&h=1365&fit=clip&crop=faces%2Cfocalpoint","At night, a camera is on top of a tripod. The camera is pointing upward toward the sky. Filling the sky are stars and swaths of green aurora. Trees fill the lower background.","A tripod stabilizes a DLSR camera while it images the night sky.","Neil Zeller",{"x":270,"y":270},2048,1365,"https://science.nasa.gov/feature/nasas-guide-to-finding-and-photographing-auroras/",{"name":228,"attributes":340,"innerBlocks":341},{"anchor":16,"ordered":84,"values":16},[342],{"name":232,"attributes":343},{"anchor":16,"content":16},{"name":223,"attributes":345},{"anchor":346,"content":347,"level":44,"stripped_content":348},"h-fast-fact","\u003Cstrong>Fast Fact\u003C/strong>","Fast Fact",{"name":235,"attributes":350},{"anchor":16,"content":351,"dropCap":27},"Even though Voyager 1 travels about a million miles per day, the spacecraft will take about 300 years to reach the inner boundary of the Oort Cloud and probably another 30,000 years to exit the far side.",{"name":353,"attributes":354},"core/embed",{"allowResponsive":84,"anchor":16,"caption":355,"previewable":84,"providerNameSlug":356,"responsive":84,"type":357,"url":358,"embed_handler":359},"A short video guide to distance in the cosmos. 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